source: rtems-tools/rtemstoolkit/elftoolchain/libdwarf/dwarf_finish.3 @ 4bb3996

.\" Copyright (c) 2009,2011 Joseph Koshy.  All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" This software is provided by Joseph Koshy ``as is'' and
.\" any express or implied warranties, including, but not limited to, the
.\" implied warranties of merchantability and fitness for a particular purpose
.\" are disclaimed.  in no event shall Joseph Koshy be liable
.\" for any direct, indirect, incidental, special, exemplary, or consequential
.\" damages (including, but not limited to, procurement of substitute goods
.\" or services; loss of use, data, or profits; or business interruption)
.\" however caused and on any theory of liability, whether in contract, strict
.\" liability, or tort (including negligence or otherwise) arising in any way
.\" out of the use of this software, even if advised of the possibility of
.\" such damage.
.\"
.\" $Id: dwarf_finish.3 2122 2011-11-09 15:35:14Z jkoshy $
.\"
.Dd November 9, 2011
.Os
.Dt DWARF_FINISH 3
.Sh NAME
.Nm dwarf_finish ,
.Nm dwarf_object_finish
.Nd free resources associated with a debug descriptor
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft int
.Fn dwarf_finish "Dwarf_Debug dbg" "Dwarf_Error *err"
.Ft int
.Fn dwarf_object_finish "Dwarf_Debug dbg" "Dwarf_Error *err"
.Sh DESCRIPTION
The
.Fn dwarf_finish
and
.Fn dwarf_object_finish
functions are used to release the resources associated with a debug
descriptor allocated by a prior call to
.Xr dwarf_init 3
and
.Xr dwarf_object_init 3
respectively.
.Pp
Argument
.Ar dbg
denotes a valid
.Vt Dwarf_Debug
instance.
Argument
.Ar err
will be used to record error information in case of an error.
.Pp
After a call to
.Fn dwarf_finish
or
.Fn dwarf_object_finish ,
the argument
.Ar dbg
will be invalid and should not be used further.
.Pp
For
.Vt Dwarf_Debug
descriptors opened using
.Xr dwarf_init 3 ,
the application would need to explicitly release the
.Vt Elf
instance associated with the descriptor by first retrieving
the instance using
.Xr dwarf_get_elf 3
and closing it using
.Xr elf_end 3 .
.Sh RETURN VALUES
These functions return
.Dv DW_DLV_OK
if successful.
In case of an error, the functions return
.Dv DW_DLV_ERROR
and record additional information in argument
.Ar err .
.Sh EXAMPLES
To deallocate a
.Vt Dwarf_Debug
instance allocated using
.Xr dwarf_elf_init 3
use:
.Bd -literal -offset indent
Dwarf_Debug dbg;
Dwarf_Error de;

if (dwarf_finish(dbg, &de) != DW_DLV_OK)
        errx(EXIT_FAILURE, "dwarf_finish: %s", dwarf_errmsg(de));
.Ed
.Pp
To deallocate a
.Vt Dwarf_Debug
instance allocated using
.Xr dwarf_object_init 3
use:
.Bd -literal -offset indent
Dwarf_Debug dbg;
Dwarf_Error de;

if (dwarf_object_finish(dbg, &de) != DW_DLV_OK)
        errx(EXIT_FAILURE, "dwarf_object_finish: %s",
            dwarf_errmsg(de));
.Ed
.Pp
To deallocate a
.Vt Dwarf_Debug
instance allocated using
.Xr dwarf_init 3
use:
.Bd -literal -offset indent
Dwarf_Debug dbg;
Dward_Error de;
Elf *e;

if (dwarf_get_elf(dbg, &e, &de) != DW_DLV_OK)
        errx(EXIT_FAILURE, "dwarf_get_elf: %s", dwarf_errmsg(&de));

if (dwarf_finish(dbg, &de) != DW_DLV_OK)
        errx(EXIT_FAILURE, "dwarf_finish: %s", dwarf_errmsg(de));

(void) elf_end(e);
.Ed
.Sh SEE ALSO
.Xr elf_end 3 ,
.Xr dwarf_elf_init 3 ,
.Xr dwarf_get_elf 3 ,
.Xr dwarf_init 3 ,
.Xr dwarf_object_init 3